Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints

Autores
Cuitiño, José Ignacio; Santos, Roberto Ventura; Scasso, Roberto Adrian
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The early Miocene Patagoniense transgression in southwestern Patagonia, Argentina (Estancia 25 de Mayo Formation), consists of shallow marine to estuarine deposits that bear numerous oyster shell beds distributed all over the sedimentary column. Sedimentary facies analysis reveal that oysters grew in the nearshore paleoenvironments of the stratigraphically lower Quién Sabe Member, as well as in the tide-dominated, shallow marine to estuarine paleoenvironments ofthe upper Bandurrias 26 Member. Two species lying in separate portions of the column were identified: Crassostrea? hatcheri, distributed in the lower two thirds of the column and Crassostrea orbignyi, distributed in the upper third of the column, within the transition from marine to fluvial deposits. Petrographic, cathodoluminiscence, and carbon and oxygen stable isotope analyses for individual growth increments were performed on all the oyster beds, together with serialized intra-shell analyses for one specimen of each species. The stable isotope composition of the shell was found to be strongly controlled by the microstructure due to selective diagenetic alteration of the chalky material whereas translucent (foliated and prismatic) layers are well preserved and can be used to infer paleoenvironmental conditions. Isotopic and sedimentologic data indicates that C.? hatcheri lived in shallow, normal marine waters with a range of paleotemperatures from 11º to 19ºC. Monospecific beds of this oyster are related to opportunistic and quick colonization of sea bottom. Decreasing growth rates along the ontogeny of thisoyster are registered. Highly depleted C and O isotope ratios in C. orbignyi shells resulted from paleosalinity decrease, and environmental stress controlled the development of these low-diversity oyster accumulations. The separate stratigraphic distribution of each oyster species was therefore controlled by the  paleoenvironmental conditions.
Fil: Cuitiño, José Ignacio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Fil: Santos, Roberto Ventura. Universidade Do Brasilia; Brasil
Fil: Scasso, Roberto Adrian. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Materia
Stable Isotopes
Paleoenvironments
Paleosalinity
Oysters
Shell Microstructure
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/18042
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/18042
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraintsCuitiño, José IgnacioSantos, Roberto VenturaScasso, Roberto AdrianStable IsotopesPaleoenvironmentsPaleosalinityOystersShell Microstructurehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The early Miocene Patagoniense transgression in southwestern Patagonia, Argentina (Estancia 25 de Mayo Formation), consists of shallow marine to estuarine deposits that bear numerous oyster shell beds distributed all over the sedimentary column. Sedimentary facies analysis reveal that oysters grew in the nearshore paleoenvironments of the stratigraphically lower Quién Sabe Member, as well as in the tide-dominated, shallow marine to estuarine paleoenvironments ofthe upper Bandurrias 26 Member. Two species lying in separate portions of the column were identified: Crassostrea? hatcheri, distributed in the lower two thirds of the column and Crassostrea orbignyi, distributed in the upper third of the column, within the transition from marine to fluvial deposits. Petrographic, cathodoluminiscence, and carbon and oxygen stable isotope analyses for individual growth increments were performed on all the oyster beds, together with serialized intra-shell analyses for one specimen of each species. The stable isotope composition of the shell was found to be strongly controlled by the microstructure due to selective diagenetic alteration of the chalky material whereas translucent (foliated and prismatic) layers are well preserved and can be used to infer paleoenvironmental conditions. Isotopic and sedimentologic data indicates that C.? hatcheri lived in shallow, normal marine waters with a range of paleotemperatures from 11º to 19ºC. Monospecific beds of this oyster are related to opportunistic and quick colonization of sea bottom. Decreasing growth rates along the ontogeny of thisoyster are registered. Highly depleted C and O isotope ratios in C. orbignyi shells resulted from paleosalinity decrease, and environmental stress controlled the development of these low-diversity oyster accumulations. The separate stratigraphic distribution of each oyster species was therefore controlled by the  paleoenvironmental conditions.Fil: Cuitiño, José Ignacio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaFil: Santos, Roberto Ventura. Universidade Do Brasilia; BrasilFil: Scasso, Roberto Adrian. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaSociety For Sedimentary Geology2013-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/18042Cuitiño, José Ignacio; Santos, Roberto Ventura; Scasso, Roberto Adrian; Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints; Society For Sedimentary Geology; Palaios; 28; 6-2013; 583-5980883-1351enginfo:eu-repo/semantics/altIdentifier/url/http://palaios.geoscienceworld.org/content/28/9/583info:eu-repo/semantics/altIdentifier/doi/10.2110/palo.2012.p12-105rinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:51:18Zoai:ri.conicet.gov.ar:11336/18042instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:51:18.886CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints
title Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints
spellingShingle Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints
Cuitiño, José Ignacio
Stable Isotopes
Paleoenvironments
Paleosalinity
Oysters
Shell Microstructure
title_short Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints
title_full Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints
title_fullStr Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints
title_full_unstemmed Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints
title_sort Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints
dc.creator.none.fl_str_mv Cuitiño, José Ignacio
Santos, Roberto Ventura
Scasso, Roberto Adrian
author Cuitiño, José Ignacio
author_facet Cuitiño, José Ignacio
Santos, Roberto Ventura
Scasso, Roberto Adrian
author_role author
author2 Santos, Roberto Ventura
Scasso, Roberto Adrian
author2_role author
author
dc.subject.none.fl_str_mv Stable Isotopes
Paleoenvironments
Paleosalinity
Oysters
Shell Microstructure
topic Stable Isotopes
Paleoenvironments
Paleosalinity
Oysters
Shell Microstructure
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The early Miocene Patagoniense transgression in southwestern Patagonia, Argentina (Estancia 25 de Mayo Formation), consists of shallow marine to estuarine deposits that bear numerous oyster shell beds distributed all over the sedimentary column. Sedimentary facies analysis reveal that oysters grew in the nearshore paleoenvironments of the stratigraphically lower Quién Sabe Member, as well as in the tide-dominated, shallow marine to estuarine paleoenvironments ofthe upper Bandurrias 26 Member. Two species lying in separate portions of the column were identified: Crassostrea? hatcheri, distributed in the lower two thirds of the column and Crassostrea orbignyi, distributed in the upper third of the column, within the transition from marine to fluvial deposits. Petrographic, cathodoluminiscence, and carbon and oxygen stable isotope analyses for individual growth increments were performed on all the oyster beds, together with serialized intra-shell analyses for one specimen of each species. The stable isotope composition of the shell was found to be strongly controlled by the microstructure due to selective diagenetic alteration of the chalky material whereas translucent (foliated and prismatic) layers are well preserved and can be used to infer paleoenvironmental conditions. Isotopic and sedimentologic data indicates that C.? hatcheri lived in shallow, normal marine waters with a range of paleotemperatures from 11º to 19ºC. Monospecific beds of this oyster are related to opportunistic and quick colonization of sea bottom. Decreasing growth rates along the ontogeny of thisoyster are registered. Highly depleted C and O isotope ratios in C. orbignyi shells resulted from paleosalinity decrease, and environmental stress controlled the development of these low-diversity oyster accumulations. The separate stratigraphic distribution of each oyster species was therefore controlled by the  paleoenvironmental conditions.
Fil: Cuitiño, José Ignacio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Fil: Santos, Roberto Ventura. Universidade Do Brasilia; Brasil
Fil: Scasso, Roberto Adrian. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; Argentina
description The early Miocene Patagoniense transgression in southwestern Patagonia, Argentina (Estancia 25 de Mayo Formation), consists of shallow marine to estuarine deposits that bear numerous oyster shell beds distributed all over the sedimentary column. Sedimentary facies analysis reveal that oysters grew in the nearshore paleoenvironments of the stratigraphically lower Quién Sabe Member, as well as in the tide-dominated, shallow marine to estuarine paleoenvironments ofthe upper Bandurrias 26 Member. Two species lying in separate portions of the column were identified: Crassostrea? hatcheri, distributed in the lower two thirds of the column and Crassostrea orbignyi, distributed in the upper third of the column, within the transition from marine to fluvial deposits. Petrographic, cathodoluminiscence, and carbon and oxygen stable isotope analyses for individual growth increments were performed on all the oyster beds, together with serialized intra-shell analyses for one specimen of each species. The stable isotope composition of the shell was found to be strongly controlled by the microstructure due to selective diagenetic alteration of the chalky material whereas translucent (foliated and prismatic) layers are well preserved and can be used to infer paleoenvironmental conditions. Isotopic and sedimentologic data indicates that C.? hatcheri lived in shallow, normal marine waters with a range of paleotemperatures from 11º to 19ºC. Monospecific beds of this oyster are related to opportunistic and quick colonization of sea bottom. Decreasing growth rates along the ontogeny of thisoyster are registered. Highly depleted C and O isotope ratios in C. orbignyi shells resulted from paleosalinity decrease, and environmental stress controlled the development of these low-diversity oyster accumulations. The separate stratigraphic distribution of each oyster species was therefore controlled by the  paleoenvironmental conditions.
publishDate 2013
dc.date.none.fl_str_mv 2013-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/18042
Cuitiño, José Ignacio; Santos, Roberto Ventura; Scasso, Roberto Adrian; Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints; Society For Sedimentary Geology; Palaios; 28; 6-2013; 583-598
0883-1351
url http://hdl.handle.net/11336/18042
identifier_str_mv Cuitiño, José Ignacio; Santos, Roberto Ventura; Scasso, Roberto Adrian; Insights into the distribution of shallow-marine to estuarine Early Miocene oysters from southwestern Patagonia: sedimentologic and stable isotope constraints; Society For Sedimentary Geology; Palaios; 28; 6-2013; 583-598
0883-1351
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://palaios.geoscienceworld.org/content/28/9/583
info:eu-repo/semantics/altIdentifier/doi/10.2110/palo.2012.p12-105r
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Society For Sedimentary Geology
publisher.none.fl_str_mv Society For Sedimentary Geology
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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